OpenWrt – Rev 3

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#!/bin/sh

rt2x00_eeprom_die() {
        echo "rt2x00 eeprom: " "$*"
        exit 1
}

rt2x00_eeprom_extract() {
        local part=$1
        local offset=$2
        local count=$3
        local mtd

        mtd=$(find_mtd_part $part)
        [ -n "$mtd" ] || \
                rt2x00_eeprom_die "no mtd device found for partition $part"

        dd if=$mtd of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=$count 2>/dev/null || \
                rt2x00_eeprom_die "failed to extract from $mtd"
}

jboot_eeprom_extract() {
        local part=$1
        local offset=$2
        local mtd

        mtd=$(find_mtd_part $part)
        [ -n "$mtd" ] || \
                rt2x00_eeprom_die "no mtd device found for partition $part"

        jboot_config_read -i $mtd -o $offset -e /lib/firmware/$FIRMWARE  2>/dev/null || \
                rt2x00_eeprom_die "failed to extract from $mtd"
}

rt2x00_eeprom_set_macaddr() {
        local macaddr=$1

        [ -n "$macaddr" ] || \
                rt2x00_eeprom_die "invalid wlan mac address"

        macaddr_2bin $macaddr | dd of=/lib/firmware/$FIRMWARE \
                                conv=notrunc bs=1 seek=4 count=6 2>/dev/null || \
                rt2x00_eeprom_die "failed to write mac address to eeprom file"
}

FW="/lib/firmware/$FIRMWARE"
[ -e "$FW" ] && exit 0

. /lib/functions.sh
. /lib/functions/system.sh

board=$(board_name)

case "$FIRMWARE" in
"soc_wmac.eeprom")
        case $board in
        dlink,dwr-116-a1|\
        dlink,dwr-921-c1)
                wan_mac=$(jboot_config_read -m -i $(find_mtd_part "config") -o 0xE000)
                wifi_mac=$(macaddr_add "$wan_mac" 1)
                jboot_eeprom_extract "config" 0xE000
                rt2x00_eeprom_set_macaddr $wifi_mac
                ;;
        tiny-ac)
                wifi_mac=$(mtd_get_mac_ascii u-boot-env INIC_MAC_ADDR)
                rt2x00_eeprom_extract "factory" 0 512
                rt2x00_eeprom_set_macaddr $wifi_mac
                ;;
        *)
                rt2x00_eeprom_die "Please define mtd-eeprom in $board DTS file!"
                ;;
        esac
        ;;
esac